STUDIES ON THE MUTAGENIC ACTION OF CHEMICAL AND PHYSICAL AGENCIES ON YEASTS VI. Effect of Chrysene on the Rate of Growth and Fermentation of the Diploid Brewery Yeast.



The immediate effect of chrysene on the growth rate and fermentation characteristics of the control diploid brewery yeast has been investigated. The chemical induces a stimulation in the rate of growth, discernible after an incubation period of about 36 hours. Under anaerobic conditions, however, the chemical affects adversely the normal fermentation rate of the strain.

The chrysene-induced tetraploids ferment sugar solutions much faster than the parent diploid, the improvement in the fermentative ability being identical with that obtained in the case of the acenaphthene-induced tetraploid.

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